The Morning Paper [0] has a nice discussion and quotes the original paper from 2000. The same link is at the very bottom of the post, behind "original". However, it seems that MIT rearranged something and the link has gone stale. Maybe someone at MIT could make it appear under the original URL [1] again?
I would point out that Dr Cook would probably disagree greatly with the whole idea of AntiFragile, or at least has the few time i have been able to talk with him. This link you offer is probably not the best context in which to comment on this paper.